package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public List<ShoppingCart> GetShoppingCartlist() {
        return shoppingCartMapper.GetShoppingCartlist();
    }


    @Override
    public void AddShoppingCart(ShoppingCartDTO shoppingCartDTO, Long userId) {

        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //未获取到UserId


            shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCartsList = shoppingCartMapper.list(shoppingCart);


        if (shoppingCartsList != null && shoppingCartsList.size() > 0) {
//            如果存在，就更新数量，+1
            shoppingCart = shoppingCartsList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber() + 1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        } else {
//            如果不存在，插入数据
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
//                添加到购物车的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            } else {
//                添加到购物车的是套餐
                Setmeal setmeal = setmealMapper.getById(shoppingCartDTO.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    @Override
    public void SubShoppingCart(ShoppingCartDTO shoppingCartDTO, Long userId) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);


        shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCartsList = shoppingCartMapper.list(shoppingCart);

        if (shoppingCartsList != null&& !shoppingCartsList.isEmpty()){
            shoppingCart = shoppingCartsList.get(0);

            if (shoppingCart.getNumber()>1){
                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }else {
                shoppingCartMapper.SubShoppingCart(shoppingCart);
            }

        }


    }

    @Override
    public void CleanShoppingCart(Long userId) {
        shoppingCartMapper.CleanShoppingCart(userId);
    }
}
